None of them could have any serious issue in design but the all-new IEP system could.
Huh? What makes you think that an IEP system could? You are referring to a country that appeared to have taken a global lead in electromagnetics, ranging from MAGLEVs to railguns to EM catapults to EVs. As I said, if the PLAN thinks its going to have trouble, they will not install on the ship. Whatever technical advantages IEP is, is not going to outweigh the disruption of their building schedules. They will install it on the 054B only if it is ready. The IEP system will have to be proven itself, either on the ground, on test platforms, and on test ships, before it will be on the 054B. You will be foolish to assume the 054B will be used as a test ship itself. By the way, IEP itself is not shown to be a problem with on the Daring class, it is the cooling equipment on the ship that failed. Cooling is critical on destroyers with AESA, such as the Daring, and its going to be more so when the 055 not only has panels larger than any ship, but it also has a second set, not to mention its communications and EW are also set in flat array form. This is a tremendous amount of RF and EMF the 055 is emitting with all the possibilities for interference. IEP isn't the problem on the Zumwalt either but it has issues with its radars. These two cases illustrate where a ship can potentially fail, never mind that it took years for the 052C radars to fix its problems, for the AEGIS to work with littorals, years to fix the Admiral Gorshkov's radars and fire control system, this being Russia's most modern warship.
The 075 happens to be the country's first ever LHD, second flat top, and the first to be built by this shipyard which has no experience in building flat tops. Its a risky move there that they are already building the third without having to wait for the first to be commissioned.